Asbestos TEM analysis report, Sept 25, 2001

NYC 9/11 Public Portal Document

ATC Environmental, Inc. 104 East 25th Street New York, New York 10010 ATC Associates Inc. Approved N.Y. State ELAP #10879 104 East 25th Street ACCREDITED NVLAP Lab Code #1187 .J New York, NY 10010 Report Date: 09/25/01 ASBESTOS FIBER ANALYSIS BY■TRANSMISSION ELECTRON MICROSCOPY (TEM) With Fiber Identification by Selected-Area Electron Diffraction (SAED) and Energy-Dispersive X-RAY Speccroscopy (EDS) Method: AHERA Final Rule, EPA Federal Register (40 CPR. Part 763). Vol. 52. No. 210, October 30, 1967

Sample Identification Analysis Parameters

Project/Site: £0 Rect^r St^^et,40 Rector St;,NY,m TEM Sample No.: 5554 59457 Floor^l9j 18jajr9^8 Date Received: 09/24/01 Grid Openings Analyzed:__6

Project Sample No.: 09-24-16 Average Grid Opening; 106.00 um

Air Volume: 1320 liters Total Area Analyzed: 0.0674 mm2

Filter Type: MCE 25 mm diam., Pore Size: 0.45 um Analytical Sensitivity: 14.8 s/mm2 Effective Area: 385 rnm2 0,0043 s/cc

FIBROUS PARTICULATES ANALYZED Number Observed CONCENTRATION Total Single Matrix Total. Struct.. Filter Air Fibers Bundles Clusters Struct. Struct >=5um Struct/mm2 5truct/cc ngm/mS

Chrysotile Asbestos 0 0 0 0 0 0 0.0 0.0000 0

Amphibole Asbestos 0 0 0 0 0 0 0.0 0.0000 . 0

Ambiguous 0 0 0 0 0 0 0.0 0.0000 0

Total asbestos (includes ambiguous structures) 0 0 0.0 0.0000 0 Non-Asbestos 0 0 0 0 0 0 0.0 0.0000 N/A No Identification 0 0 0 0 0 0 0.0 0.0000 N/A

Totals (All Structures) 0 0 0.0 0.0000 N/A The estimated uncertainty of this analysis is 1 standard deviation.

Non-asbestos fiber i.d. (EDS/SAED): None detected : Amphibole Asbestos Type: None detected The Analysis was carried out in accordance with the approved TEM method. This laboratory is in compliance with the quality specified for the method. '..-J Analyzed by: Report Reviewed by:

Roman Peysakhov Michael A. Gorycki, Ph.D. Director of Electron Microscopy

NYC-WTC_000174877